(Red and green) light, (if mixing), (in) the right proportion, (will give) us yellow.（　）

A:Red and green B:if mixing C:in D:will give

Passage One
What is color Why do some objects look red, others green, others blue
Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red light. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.
What happens to the colors of light that are not reflected They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-colored clothes.

A:Dark-colored clothes are warmer in the sunlight. B:Objects absorb part of the sunlight. C:Color is caused by reflected light rays. D:A red object reflects mostly red light.

The traffic lights were red when the motorist moved to them. To the surprise of this passenger the car did not slow down. Suddenly the passenger was thrown forward in the car as the driver stopped it at the last minute. The car stopped in time. "Sorry," said the driver, "I didn’t notice the light. I thought it was green until 1 saw that it was the top light which was shining. I am color blind, I can’t see red colors as you can."
This strange story is quite true. In fact about ten men in every hundred suffer from color blindness in some way, women are luckier-only about one in two hundred is affected like this. Perhaps, after all, it is safer to be driven by a woman!
Color blindness can be dangerous. For example, when fighting in the woods at night soldiers use lights to signal to each other. A green light may mean "advance" and a red light may mean" Danger! keep back!" You can see what will happen if somebody thinks that red is green !
Birds and animals which hunt at night can not see colors. As far as we know, bats can not see colors at all--only light and dark shapes. The eyes of some insects are very strange. They have thousands of little "eyes" all joined together. Insects can see ultra-violet rays (紫外线) which are invisible to us, and some of them can even see X-rays. Indeed, scientists know that there are other colors around us which insects can see but we can not.
One scientist experimented with some ants which normally keep their eggs in the dark. When he put their eggs in the sunlight, the ants quickly dragged them into a dark place. The eggs were then put in different colored rays of light, when the scientist shone an ultra-violet ray on the eggs, then ants quickly dragged them into the red light, thinking that it was dark- ness. Some insects have favourite colors. Mosquitoes like blue but do not like yellow. A red light will not attract insects, but a blue lamp will.
In a similar way human beings have favourite colors. Blue is often popular because it is the color of the cool sky and sea. Green is a peaceful color which makes us think of wide fields and forests. Yellow is the cheerful color of the sun. On the other hand, red is the Color
of blo, d and fire. It makes some people think of accident, danger and blood. Black is the col- or of night. In the dark we cannot see what is around us, so we are sometimes afraid of the unknown and so not like black as a color. Perhaps that is why it is often the color of sadness. Yet we are lucky. We can see many beautiful colors by day, and we can see shapes but not color at night. One day we may even learn more about the invisible colors around us.
The reason for some ants to keep their eggs in the dark is______.

A:that it is cooler there B:that they do not like sunlight C:not mentioned in the passage D:that they like red light

The traffic lights were red when the driver reached them. To the surprise of his passenger, the car did not slow down. Unexpectedly the passenger was thrown forward in the vehicle as the driver put on his brakes at the last moment. The car stopped just in time.
"Sorry, I didn’t notice the light. I thought it was green until I saw that it was the top light which was shining."
This strange story is quite true. About ten men in every hundred are color blind in some way; women are luckier--only about one in two hundred suffers from color blindness.
In some cases, a man may not be able to see deep red. He may think that red, orange and yellow are all the same as green.
People often like one color more than others. Blue is the color of the sky and sea. Green makes us think of fields and trees. Red is the color of blood and makes some people think of danger. Black is the color of night. In the dark we cannot see what is around us so we are sometimes afraid of the unknown and do not like black as a color.
One is considered as a color blind man if ______.

A:he can see the difference between red and deep red B:he can see the difference between blue and green C:he can’t tell the difference between orange and green D:he thinks green is the same as blue

The traffic lights were red when the driver reached them. To the surprise of his passenger, the car did not slow down. Unexpectedly the passenger was thrown forward in the vehicle as the driver put on his brakes at the last moment. The car stopped just in time.
"Sorry, I didn’t notice the light. I thought it was green until I saw that it was the top light which was shining."
This strange story is quite tree. About ten men in every hundred are color blind in some way, women are luckier — only about one in two hundred suffers from color blindness.
In some cases, a man may not be able to see deep red. He may think that red, orange and yellow are all the same as green.
People often like one color more than others. Blue is the color of the sky and sea. Careen makes us think of fields and trees. Red is the color of blood and makes some people think of danger. Black is the color of night. In the dark we cannot see what is around us so we are sometimes afraid of the unknown and do not like black as a color.
One is considered as a color blind man if______.

A:he can see the difference between red and deep red B:he can see the difference between blue and green C:he can’t tell the difference between orange and green D:he thinks green is the same as blue

阅读下列短文，然后根据短文的内容从每小题的四个选择项中，选出最佳的一项。
A

A:that it is cooler there B:that they do not like sunlight C:not mentioned in the passage D:that they like red light

Among the traffic lights, red light is placed ______.

A:at the bottom B:in the middle C:at the top D:below the green light